"Great shot. I love the colors, balance, expression and tone of the light for both the background and your subject." +1 " the shadows are falling on the sun side! " pourquoi pas? Sand and figure of a man do not have a strong light and shadows from the Sun. Okta normally drawn to the background light IMHO. Psychologically interesting humoristic pathos in facial expression. The task is solved portrait. I liked it.

Clean and non-aggressive cleaning agent - water for injection ampoules. Purchased at your local pharmacy. Do not use large amounts of water. Fiber should be slightly moist. Do not mount the lens to the body to dry completely. Pure water does not leave sticky spots for dust.)))

1) Confirmation tone focus in manual or auto mode. When a signal is try to open the aperture and maximum use sunlight outdoors or infrared light external flash. 2) Clean the contact lens with the body, flip through the manual-auto switch on the lens a few times, rotate the dial aperture in manual mode a few times, may have dust on any contacts. 3) Turn off the camera, remove the battery, hold the body without the adapter, and then insert the battery, turn the camera (reboot). 4) Try a different lens.(Google english)